Relations and joins between tables with primary key clustered index - sql

Question

Created two tables using PRIMARY KEY CLUSTERED with identity and Date ON partition because a task splits and truncates partitions older that 30 days. keeping only the recent records.
I have a special field to correlate the tables, but the joins are painfully slow even with indexes. Could you suggest how to optimize?
Next the tables and the Join statement:
CREATE TABLE [dbo].[Redeem](
[Id] [int] IDENTITY(1,1) NOT NULL,
[Ticket] [nvarchar](64) NOT NULL,
[CorrelationTicket] [nvarchar](64) NOT NULL,
[CreatedUTC] [datetime] NOT NULL,
[CreatedDate] [date] NOT NULL,
[Redeem fields here...]
CONSTRAINT [PK_Redeem] PRIMARY KEY CLUSTERED
(
[CreatedDate] ASC,
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
)
ON myPS([CreatedDate]);
CREATE NONCLUSTERED INDEX [IX_Redeem_CorrelationTicket]
ON [dbo].[Redeem]([CreatedDate] ASC, [CorrelationTicket] ASC)
ON [myPS] ([CreatedDate]);
CREATE TABLE [dbo].[Validate](
[Id] [int] IDENTITY(1,1) NOT NULL,
[Ticket] [nvarchar](64) NOT NULL,
[CorrelationTicket] [nvarchar](64) NOT NULL,
[CreatedUTC] [datetime] NOT NULL,
[CreatedDate] [date] NOT NULL,
[Validate fields here...]
CONSTRAINT [PK_Validate] PRIMARY KEY CLUSTERED
(
[CreatedDate] ASC,
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
)
ON myPS([CreatedDate]);
CREATE NONCLUSTERED INDEX [IX_Validate_CorrelationTicket]
ON [dbo].[Validate]([CreatedDate] ASC, [CorrelationTicket] ASC)
ON [myPS] ([CreatedDate]);
And this is the Join:
SELECT top 100
v.*,
r.*
from
Validate v
LEFT OUTER join Redeem r
on v.CorrelationTicket = r.CorrelationTicket
ORDER BY v.CreatedDate DESC

Answer 1

Thank you Krintner!
The problem was the ORDER BY as you suggested. it was sorting the entire result set (not sure why).
I do need to sort, but changing the Index to be DESC did the trick.
I also follow the recommendation and use only CorrelationTicket in the INDEX.
CONSTRAINT [PK_Redeem] PRIMARY KEY CLUSTERED
(
[CreatedDate] DESC,
[Id] DESC
)